After MacGyver goes to the train's counter/bar and orders a roasted lamb sandwich, he and the one-armed doctor that's having a drink there start talking to each other. In one of the scenes where the doctor is talking to MacGyver we can see the bartender/waiter behind the counter/bar pouring some drink. He is on the doctor's right side, right in front of where MacGyver is standing. The very next scene is shot from a different angle but now the bartender/waiter is on the opposite side of the counter/bar.

When MacGyver is walking over the train wagons, you can see that there are two drivers in the locomotive. The left one is difficult to spot, but it is possible to see his head and one hand. Later Mac talk to one driver, and there is not mention to the other one, probably because one is the actor, and the real driver is concealed.